At this the Jews there began to grumble about him because he said, “I am the bread that came down from heaven.” They said, “Is this not Jesus, the son of Joseph, whose father and mother we know? How can he now say, ‘I came down from heaven’?”
The Jews referred to here are presumably members or leaders of the local synagogue. They knew that Joseph and Mary had come from Nazareth, but they did not know the Prologue of this Gospel nor the story of the Virginal Conception.
WE think we know Jesus, but our knowledge of him is often superficial. We had some JWs visit the other day, but when I challenged them over the nature of Jesus they retreated into platitudes and would not focus on the real issue that Jesus is God.
We also skip over that Jesus is Lord and find ourselves saying, "No, Lord," when it should be, "Yes, Lord."